#linuxcrew

[linuxtechlab]

VPN is now becoming a must-have for using the internet. Whether you want to secure your internet traffic or want to access some content on a streaming service that is currently not available in your country.

Whatever the reason, VPN is now becoming a necessity, especially since there are privacy concerns looming around & also people do want to know which is the best VPN for PC or best VPN for Torrenting or Streaming Netflix, as there might be some restrictions in the country where you belong to.

But first for the uninitiated, a brief on VPN.

[joptimisemonpc]

Quelle Distribution Linux La Plus Recommandée Pour Les Débutants ?

https://www.joptimisemonpc.com/quelle-distribution-linux-la-plus-recommandee-pour-les-debutants/

#Linux #linuxfan #linuxmint #linuxadmin #linuxhosting #linuxindonesia #linuxday #linuxgames #linuxkeough #linuxthedog #linuxmasterrace #linuxcards #linuxuserofficial #linuxcrew #linuxer #linuxpro

[linuxtechlab]

If you are trying to install a new Ubuntu version or just want to see how a new version of Ubuntu looks like, then the best way to do so is to create and use a Live USB aka Ubuntu bootable USB.

Not only can we install or test Ubuntu, but we can also use it as a personal operating system that can be used on any Laptop or Desktop without having to make any major changes to the systems.

You will need the following to create a Ubuntu Bootable USB from the command line or CLI,

   USB drive / Pendrive with at least 4 GB capacity    Ubuntu ISO file (get it from HERE Get Ubuntu | Download | Ubuntu)    a Linux system (here we are using Ubuntu only but this tutorial will work for all Linux systems)

Once you have all these then, we can proceed to create a Ubuntu Bootable USB.

[linuxtechlab]

Like any other application or server, Redis installations might also be susceptible to unauthorized access or intrusions, if we have not secured it properly. In this tutorial, we will focus on securing Redis server to avoid any unauthorized access or intrusions.

Redis is an open source, in-memory data structure store or a key-value store that can be used as a cache for application, as a database server or even as a message broker.

In our previous tutorials, we have already discussed the installation & also setting up a master-slave like architecture for the Redis server.

[linuxtechlab]

Having a comprehensive data protection policy in place is now a fundamental practice to help ensure your data manages to weather all the storms that can be thrown at it. Saying that it should be done is the easy part, actually doing it gets more complex, and laborious, depending on the policy in place and what standards and laws the organization needs to adhere to.

Fortunately, for Linux users there a tool exists that makes backing up data a breeze, and it can all be done from the command line.

Utilizing rsync’s most basic features allows the user to backup, modify, and delete files via the use of a remote server.

[linuxtechlab]

Glances is an open source real time Linux server monitoring system that aims at providing as much as information possible in as minimum as space possible. Glances is like top command but more refined with many more features & much more real time information of your Linux system.

Glances provide information regarding memory, CPU, Disk IO , file system, Uptime, processes, interfaces, alerts & many other system information.

One of the best features of Glances is that it can work in server/client mode. We can perform remote monitoring of the systems using a Web interface or through terminal/CLI & we can also export stats to a file.

[linuxtechlab]

Earlier we have discussed how we can configure network connections using three different methods i.e. by editing network interface file, by using GUI & by using nmtui command. In this tutorial, we are going to use two other methods to configure network connections on our RHEL/CentOS machines. We are going to discuss 'nmcli' command & 'ifconfig' command in Linux.First utility that we will be using is ‘nmcli’ command & we can configure network on almost any Linux distribution using this method.

[linuxtechlab]

We have seen a tremendous increase in demand for automation in the IT industry & IaaC, Infrastructure as a Code is a must-needed skill to possess. There are a number of tools available for Automation/IaaC & Terraform is one such tool.

Terraform is a great tool for automating our infrastructure by converting all our infrastructure as code. We can deploy resources using only the terraform scripts.

The great thing about terraform is that it supports almost all cloud providers like AWS, GCP, Azure, IBM Cloud, etc & also supports in-house solutions.

[linuxtechlab]

Dockerfile is a text file that contains a list of commands that are used to build a docker image automatically. Basically, a docker file acts as a set of instructions that are needed to build a docker image.

We have earlier discussed how to create a docker container & also learned some important commands for managing the containers.

In this tutorial, we will learn about how to create a dockerfile, all its parameters/commands with the dockerfile example.

[linuxtechlab]

We will use one of the previously created Dockerfiles to create a Docker image & will then upload the created image to Docker Hub.

To simply explain Docker Hub, it's a public registry that has over 15000 images that can be directly used or can be used to create a custom Docker image. Docker Hub is directly maintained by Docker.

So let's start with our tutorial on how to create Docker Image, but before we do that let's discuss some pre-requisites.

[linuxtechlab]

Learn how to perform some of the common operations for Gitlab Setup, once you have installed the Gitlab server on your systems. We must be aware of how to perform following common operations as mentioned below,

Add SSH keys Create/Remove User Create/Remove Groups Create Project

In this Gitlab tutorial, we are going to discuss just that.

[linuxtechlab]

Learn to create functions for our Bash / shell scripts. Learning how to create a function is an important skill required for BASH scripting.

When we are writing our scripts, we might see ourselves using a section of the script over and over again like using a loop that is checking a condition many times in a script. So rather than writing a section of the script over & over again, we will create that section of script as a Functions aka Bash Functions also.

Functions are like a mini-script inside the scripts. We will create a function with a name & whenever that function is required, we will just type the name of the function rather than typing the whole section of a script again & again.

[linuxtechlab]

When we install a Linux distribution, we see that a number of directories are created. These created directories may be the same or partially different on various Linux distributions.

You might know about the directory structures & what purpose they serve. For those of you who don’t know about the Linux directory structure or have partial knowledge or just want to relook on Linux directory structure & its usage, this article will act as a reference guide.

We will start out this article with the Linux directories/partitions that are a must for every Linux system & are required for the Linux system to work properly. 3

These partitions are ‘/’ (root), ‘/boot’, ‘/swap’. Though the ‘/’ (root), ‘/boot’ partitions are absolutely required but a system might work without a swap partition, however, it's recommended that we have one for our Linux system.

[linuxtechlab]

Terraform is one of the most widely used applications to use the Infrastructure as Code. It is available for almost all the cloud service providers out there & also can be used for in-house solutions.

Terraform can be used to create a single instance or a complete data center. Not only instances, but we can also perform networking, DNS, or firewall management using the terraform scripts.  In this tutorial, we will discuss some of the important Terraform commands that we should know.

[linuxtechlab]

Learn how to install / enable SSH server on Ubuntu 21.04 or older versions.

In most of the Linux distributions, SSH comes installed & we can access those servers using ssh command but with Ubuntu Desktop (& based distros) that is not the case. We are required to install SSH on Ubuntu to be able to access it.

Though we have an ssh client available on Ubuntu, it’s the ssh server that we need to install on Ubuntu. It means we can access other servers from Ubuntu using ssh but other machines will not be able to access our Ubuntu systems.

[linuxtechlab]

When it comes to Linux permissions, things can get pretty tricky. Unless you are an admin user, like root, then you won’t have access to files or directories that were created by other users. In order to access those files, either their permissions should be updated to be available for other users or we can change ownership of the files.

In this tutorial, we will discuss what to do if you are required to change ownerships of files or directories. We would be discussing how to change ownership of files & directories using the ‘chown command’.